CN101711313A

CN101711313A - Integrated internal gear pump with an electric motor

Info

Publication number: CN101711313A
Application number: CN200880020585A
Authority: CN
Inventors: 维利·施耐德; 托斯滕·赫勒
Original assignee: Joma Hydromechanic GmbH
Current assignee: Joma Hydromechanic GmbH
Priority date: 2007-07-25
Filing date: 2008-07-03
Publication date: 2010-05-19
Also published as: US20100111722A1; WO2009012872A1; EP2122174A1; EP2122174B1; US8113794B2; DE102007035239A1

Abstract

The invention relates to a rotor pump having an internally toothed outer ring and an externally toothed inner ring which is mounted therein and intermeshes therewith, wherein the outer ring and the inner ring are arranged axis-parallel to one another, and the axes of the outer ring and of the inner ring are at a distance from one another, and the outer ring is connected to a hollow shaft motor with a stator which is fitted with windings, and to a rotor which is rotatably mounted therein, characterized in that the outer ring forms the rotor of the hollow shaft motor.

Description

Integrated internal gear pump with motor

The present invention relates to rotor pump, in this rotor pump has the outer shroud of engagement and be placed in this outer shroud and with this outer shroud interior ring engagement, outer gearing, wherein this outer shroud and should in the mutual parallel axes of ring ground arrange and the axis of this outer shroud and should in the axis of ring have spacing mutually, and wherein this outer shroud by stator with rotatably placed the hollow shaft motor of the rotor of this stator to drive with carrying winding.

Generally being known that can conveyance fluid and also can pressurized gas by rotor pump.For this reason, the interior ring of outer gearing rolls in the outer shroud of interior engagement, wherein should interiorly encircle with respect to this outer shroud off-centre, and drives by appropriate driving device.If should have for example 5 teeth by interior ring, then these teeth roll between 6 teeth of this outer shroud.The each rotation that encircles in being somebody's turn to do sucks fluid in 5 working rooms and discharges from these working rooms then.

By the known such internal gear pump of DE 29913367U1, wherein outer shroud drives by hollow shaft motor.Center on outer shroud and arrange the rotor of the carrying permanent magnet of this hollow shaft motor, wherein outer shroud and rotor interconnect by rights, make rotor can drive outer shroud.Be regarded as disadvantageously, such internal gear pump has big size diametrically, and must need and install a plurality of parts.

The present invention based on task provide and a kind ofly under the situation of identical conveying capacity, have smaller szie and have the still less rotor pump of assembly.

This task solves in the following manner according to the present invention under the situation of the rotor pump of the described type of beginning, and promptly outer shroud constitutes the rotor of hollow shaft motor.

The rotor of hollow shaft motor is integrated into has important advantage in the outer shroud, promptly save assembly and can reduce radial dimension simultaneously.Except saving assembly, such rotor pump is also lighter.In addition, install and become easy, because rotor is connected with outer shroud.Interior ring is around axis operation together zero loadly.Advantage is can transmit big relatively rotating force or tangential force, and not exist vibration or extreme temperature fluctuation to cause the risk that rotor is thrown off from outer shroud.

Another flexible program regulation is between the teeth groove of outer shroud or be furnished with the magnet of hollow shaft motor in the tooth.Also reduce physical dimension thus, because the space in the tooth is used to hold the magnet of hollow shaft motor.At this, that this magnet can adopt is special, with the shape of odontoid coupling.

Stipulate that in a preferred embodiment outer shroud has the space in order to hold magnet, these spaces are made of perforation or counterbore (Einsenkung).Can hold big relatively magnet by perforation, and magnet can be inserted the counterbore from both sides.

In order optimally to make full use of the space that exists between the teeth groove, the space has the cross section of lens shaped basically.The shape of cross section of magnet correspondingly mates.

Optimum driving force produces in the following manner, and promptly the tooth pitch of stator is identical with the tooth pitch of outer shroud, perhaps corresponding to the integral multiple of the tooth pitch of outer shroud.

Simple flexible program regulation, outer shroud is made of aluminium or plastics.Further reduce the weight of rotor pump thus and can make such rotor cheaply.

Further feature of the present invention, advantage and details are drawn by dependent claims and explanation subsequently, have wherein described particularly preferred embodiment in detail with reference to accompanying drawing.At this, feature illustrated in the accompanying drawings and that mention in the claims in specification neutralization self is important individually or with combination arbitrarily respectively for the present invention.

In the accompanying drawings:

Fig. 1 illustrates the perspective view according to rotor pump of the present invention;

Fig. 2 illustrates the plan view of rotor pump,

Fig. 3 illustrates rotor pump according to the side view on the direction of the arrow III of Fig. 2;

Fig. 4 illustrates the cross section IV-IV according to Fig. 2, and

Fig. 5 illustrates the cross section V-V according to Fig. 3.

In Fig. 1, represent rotor pump, utilize this rotor pump for example to carry to be used for such as the liquid of the motor of internal-combustion engine, especially oil or be used for the urea of waste gas cleaning system with reference character 10.Rotor pump 10 has inlet 12 and outlet 14 for this reason.Inlet 12 and outlet 14 are set in the housing lid 16, and this housing lid flange connects housing jar 18.At this, inlet 12 and outlet 14 exchange when changing sense of rotation.What can clearly identify is, rotor pump 10 closed in itselfs and only opening to the outside by inlet 12 and outlet 14.Do not have live axle etc. to introduce in the rotor pump 10, it is unnecessary to make that the Sealing that is used for live axle etc. becomes.Such rotor pump 10 satisfies high seal request.

Fig. 2 illustrates the plan view of housing lid 16, and by enter the mouth 12 and the outlet 14 can identify the displacement space 20.Fig. 3 illustrates rotor pump 10 with side view, and Fig. 4 illustrates rotor pump 10 with the longitudinal section that removes housing jar 18.

As can also between outer shroud 22 and interior ring 24, forming displacement space 20 from what find out according to the cross section of Fig. 5.At this, outer shroud 22 be interior engagement and in shown embodiment, have 6 inwardly outstanding teeth 26 altogether, teeth groove 36 is between these teeth.Interior ring 24 is outer gearing and tooth 28 that have 5 directed outwards altogether, and these teeth are engaged in the teeth groove 36.

Tooth

26 and 28 meshes and forms displacement space 20 at this.In addition, outer shroud 22 and interior ring 24 are coaxially aimed at mutually, and its

axis

30 and 32 has spacing 34 (eccentricity) mutually.

Outer shroud 22 constitutes the rotor 38 of hollow shaft motor 40 and rotatably places stator 42.This stator 42 has the accommodating part 44 that is used for coil (unshowned) of extending and opening to the outside diametrically in the vertical, and the outer shroud 22 of formation rotor 38 has the space 46 (Fig. 4) that is used for magnet 48.At this, shown embodiment's space 46 is implemented as counterbore, makes it possible to insert magnet 48 from each side.The cross section in space 46 is to have the footpath of profile that makes progress the first outer peripheral surface 50 around the footpath of axis 30 bendings and comply with tooth 26 upwards by the lens shape of second peripheral surface 52 of lining basically.

Can be clear that from Fig. 5 that in addition ring 24 made

tooth

26 and 28 mesh around the rotation of its axis 32 in the rotation of outer shroud 22 caused, changed the size in displacement space 20 thus.

Such rotor pump 10 is simple structure not only, and weight is little, and can install like a dream, also has bigger transmission capacity under the situation of this external same rotational speed.In addition, owing to magnet 48 is integrated in the outer shroud 22, so radial dimension is little.Can clearly identify in Fig. 5 in addition, the housing of rotor pump 10, be that its housing lid 16 and its housing jar 18 do not insert any assembly, therefore needn't worry blow-by.

Claims

1. rotor pump (10), the interior ring (24) of the outer shroud (22) of engagement and the outer gearing that is placed in the described outer shroud and meshes with described outer shroud in having, the axis (30) of the mutual parallel axes of wherein said outer shroud (22) and described interior ring (24) ground layout and described outer shroud (22) and the axis (32) of described interior ring (24) have spacing (34) mutually, and wherein said outer shroud (22) places the hollow shaft motor (40) of the rotor (38) of described stator to drive by the stator (42) with carrying winding with in rotatable mode, it is characterized in that described outer shroud (22) constitutes the rotor (38) of described hollow shaft motor (40).

2. rotor pump according to claim 1 is characterized in that, is furnished with magnet (48) between the teeth groove (36) of described outer shroud (22).

3. rotor pump according to claim 2 is characterized in that, described outer shroud (22) has space (46) in order to hold described magnet (48).

4. rotor pump according to claim 3 is characterized in that, described space (46) are made of perforation or counterbore.

5. according to claim 3 or 4 described rotor pumps, it is characterized in that described space (46) have the cross section of lens shaped basically.

6. one of require described rotor pump according to aforesaid right, it is characterized in that the tooth pitch of described stator (42) is identical with the tooth pitch of described outer shroud (22), perhaps corresponding to the integral multiple of the tooth pitch of described outer shroud (22).

7. according to one of aforesaid right requirement described rotor pump, it is characterized in that described outer shroud (22) is made of aluminium or plastics.

8. one of require described rotor pump according to aforesaid right, it is characterized in that, all component is placed within the housing (16,18) of described rotor pump (10) or on the inboard of housing (16,18) and do not have assembly to insert described housing (16,18).